Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b410bc1caeca46…

MALICIOUS

PDF

50.3 KB Created: 2020-08-31 11:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9344cc204bbc4aee5d5aa84bb6203944 SHA-1: 1f229b0fa4eb2f721db3f3dc5432df31e7b77770 SHA-256: 29b410bc1caeca462bed0078acbaae8ce14c123c134573b024547590b71b93be
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=port+5357+exploit'. This URL is presented within the document body with a lure related to exploits. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on static.usrfiles.com. The primary malicious URL is the most critical IOC.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=port+5357+exploit
    • https://static.usrfiles.com/ugd/b8c837_473943440a764100b3342c0fbc9bb6af.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c10706f4274681a2791097c196dca5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5682ad6c1e824fad9ebf8d3a9c35d490.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_3f70ff333682499894e14c376204e81a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7cd07d6a290341e78b8e927004c7b71b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe114e92fed432bb41651a335f86c31.pdf
    • https://static.usrfiles.com/ugd/73cb9e_2437d1b41bea474ca1a19d6567b91d78.pdf
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/laterite_soil_properties.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/vivexodolonirifavu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/gokew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.pdf
    • https://static.usrfiles.com/ugd/8127dd_a61b5dbbace94318ab0e2118afd52246.pdf
    • https://static.usrfiles.com/ugd/b4609a_3f93544c6bb4440696a9e61231a9a695.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000812d.bin
7d454676dd4b05c74d370062e4adea5fd23a7c819892ff8d1a4702c1d5285e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812D 4860 bytes
font_01_sfnt_off000091dc.bin
fd618c17762e1cb47285b8cda1737822d961bb93d8f765f5af89dde9ac3c93f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 13332 bytes

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